Soot oxidation in the presence of NO over alumina-supported bimetallic catalysts K–Me (Me=Cu, Co, V)

Effects of potassium additive on the activity of Ru catalyst for acetylene hydrochlorination

“…Potassium has been reported as the promoter for several catalysts. Gálvez et al 26 studied K-Me (Me ¼ Cu, Co, V) bimetallic catalysts supported on alumina for the simultaneous removal of soot and NO x , and found that K worked as a good promoter to Cu catalysts. Wang et al 27 synthesized bimetallic Pd-K/Y-zeolite catalyst and found that K promoter could effectively improve the catalytic properties of Pd-based catalyst for acetylene hydrochlorination.…”

Influence of the surface potassium species in Fe–K/Al2O3 catalysts on the soot oxidation activity in the presence of NOx

“…On the other hand, other research groups reported successful NO x conversion to N 2 [11][12][13][14][15][16], in the presence of non-noble metal compounds, i.e. such as Cu, Co and V oxides together with K-species as surface promoter [17][18][19]. Among other transition metal (TM) compounds iron oxides has been successfully used as active phase in several similar reduction-oxidation catalysts [20][21][22].…”

Promoted Soot Oxidation by Doped K2Ti2O5 Catalysts and NO Oxidation Catalysts

“…It is well-known that NO and NO 2 are helpful for soot combustion, especially for Pt-based catalysts. − In the presence of Pt, NO can be oxidized to NO 2 , which is a more oxidative reagent than O 2 . Therefore, both the effects of NO and NO 2 on soot oxidation were first investigated on K 2 Ti 2 O 5 , and the results are shown in Figures and .…”

“…The practical vehicle emissions normally contain a certain amount of NO x (∼1000 ppm, over 80% is NO). According to recent investigations, the preoxidation of NO to NO 2 will greatly help soot oxidation and decreases the combustion temperature. − , The promotion effect by the doped metals in the NO (1000 ppm) and O 2 system was investigated. The results are shown in Figure .…”